ALKMaps.Control.SelectFeature

The SelectFeature control selects vector features from a given layer on click or hover.

Inherits from

ALKMaps.Control

Summary

ALKMaps.Control.SelectFeature	The SelectFeature control selects vector features from a given layer on click or hover.
Properties
events	{ALKMaps.Events} Events instance for listeners and triggering control specific events.
multipleKey	{String} An event modifier (‘altKey’ or ‘shiftKey’) that temporarily sets the multiple property to true.
toggleKey	{String} An event modifier (‘altKey’ or ‘shiftKey’) that temporarily sets the toggle property to true.
multiple	{Boolean} Allow selection of multiple geometries.
clickout	{Boolean} Unselect features when clicking outside any feature.
toggle	{Boolean} Unselect a selected feature on click.
hover	{Boolean} Select on mouse over and deselect on mouse out.
highlightOnly	{Boolean} If true do not actually select features (that is place them in the layer’s selected features array), just highlight them.
box	{Boolean} Allow feature selection by drawing a box.
onBeforeSelect	{Function} Optional function to be called before a feature is selected.
onSelect	{Function} Optional function to be called when a feature is selected.
onUnselect	{Function} Optional function to be called when a feature is unselected.
scope	{Object} The scope to use with the onBeforeSelect, onSelect, onUnselect callbacks.
geometryTypes	{Array(String)} To restrict selecting to a limited set of geometry types, send a list of strings corresponding to the geometry class names.
layer	{ALKMaps.Layer.Vector} The vector layer with a common renderer root for all layers this control is configured with (if an array of layers was passed to the constructor), or the vector layer the control was configured with (if a single layer was passed to the constructor).
layers	{Array(ALKMaps.Layer.Vector)} The layers this control will work on, or null if the control was configured with a single layer
callbacks	{Object} The functions that are sent to the handlers.feature for callback
selectStyle	{Object} Hash of styles
renderIntent	{String} key used to retrieve the select style from the layer’s style map.
handlers	{Object} Object with references to multiple ALKMaps.Handler instances.
Constructor
ALKMaps.Control.SelectFeature	Create a new control for selecting features.
Functions
initLayer	Assign the layer property.
destroy
activate	Activates the control.
deactivate	Deactivates the control.
unselectAll	Unselect all selected features.
clickFeature	Called on click in a feature Only responds if this.hover is false.
multipleSelect	Allow for multiple selected features based on multiple property and multipleKey event modifier.
toggleSelect	Event should toggle the selected state of a feature based on toggle property and toggleKey event modifier.
clickoutFeature	Called on click outside a previously clicked (selected) feature.
overFeature	Called on over a feature.
outFeature	Called on out of a selected feature.
highlight	Redraw feature with the select style.
unhighlight	Redraw feature with the “default” style
select	Add feature to the layer’s selectedFeature array, render the feature as selected, and call the onSelect function.
unselect	Remove feature from the layer’s selectedFeature array, render the feature as normal, and call the onUnselect function.
selectBox	Callback from the handlers.box set up when box selection is true on.
setMap	Set the map property for the control.
setLayer	Attach a new layer to the control, overriding any existing layers.

Properties

events

{ALKMaps.Events} Events instance for listeners and triggering control specific events.

Register a listener for a particular event with the following syntax

control.events.register(type, obj, listener);

Supported event types (in addition to those from <ALKMaps.Control.events>)

beforefeaturehighlighted	Triggered before a feature is highlighted
featurehighlighted	Triggered when a feature is highlighted
featureunhighlighted	Triggered when a feature is unhighlighted
boxselectionstart	Triggered before box selection starts
boxselectionend	Triggered after box selection ends

multipleKey

{String} An event modifier (‘altKey’ or ‘shiftKey’) that temporarily sets the multiple property to true. Default is null.

toggleKey

{String} An event modifier (‘altKey’ or ‘shiftKey’) that temporarily sets the toggle property to true. Default is null.

multiple

{Boolean} Allow selection of multiple geometries. Default is false.

clickout

{Boolean} Unselect features when clicking outside any feature. Default is true.

toggle

{Boolean} Unselect a selected feature on click. Default is false. Only has meaning if hover is false.

hover

{Boolean} Select on mouse over and deselect on mouse out. If true, this ignores clicks and only listens to mouse moves.

highlightOnly

{Boolean} If true do not actually select features (that is place them in the layer’s selected features array), just highlight them. This property has no effect if hover is false. Defaults to false.

box

{Boolean} Allow feature selection by drawing a box.

onBeforeSelect

{Function} Optional function to be called before a feature is selected. The function should expect to be called with a feature.

onSelect

{Function} Optional function to be called when a feature is selected. The function should expect to be called with a feature.

onUnselect

{Function} Optional function to be called when a feature is unselected. The function should expect to be called with a feature.

scope

{Object} The scope to use with the onBeforeSelect, onSelect, onUnselect callbacks. If null the scope will be this control.

geometryTypes

{Array(String)} To restrict selecting to a limited set of geometry types, send a list of strings corresponding to the geometry class names.

layer

{ALKMaps.Layer.Vector} The vector layer with a common renderer root for all layers this control is configured with (if an array of layers was passed to the constructor), or the vector layer the control was configured with (if a single layer was passed to the constructor).

layers

{Array(ALKMaps.Layer.Vector)} The layers this control will work on, or null if the control was configured with a single layer

callbacks

{Object} The functions that are sent to the handlers.feature for callback

selectStyle

{Object} Hash of styles

renderIntent

{String} key used to retrieve the select style from the layer’s style map.

handlers

{Object} Object with references to multiple ALKMaps.Handler instances.

Constructor

ALKMaps.Control.SelectFeature

Create a new control for selecting features.

Parameters

layers	{ALKMaps.Layer.Vector}, or an array of vector layers. The layer(s) this control will select features from.
options	{Object}

Functions

initLayer

initLayer: function( layers )

Assign the layer property. If layers is an array, we need to use a RootContainer.

Parameters

layers

{ALKMaps.Layer.Vector}, or an array of vector layers.

destroy

destroy: function()

activate

activate: function ()

Activates the control.

Returns

{Boolean} The control was effectively activated.

deactivate

deactivate: function ()

Deactivates the control.

Returns

{Boolean} The control was effectively deactivated.

unselectAll

unselectAll: function( options )

Unselect all selected features. To unselect all except for a single feature, set the options.except property to the feature.

Parameters

options

{Object} Optional configuration object.

clickFeature

clickFeature: function( feature )

Called on click in a feature Only responds if this.hover is false.

Parameters

feature

{ALKMaps.Feature.Vector}

multipleSelect

multipleSelect: function()

Allow for multiple selected features based on multiple property and multipleKey event modifier.

Returns

{Boolean} Allow for multiple selected features.

toggleSelect

toggleSelect: function()

Event should toggle the selected state of a feature based on toggle property and toggleKey event modifier.

Returns

{Boolean} Toggle the selected state of a feature.

clickoutFeature

clickoutFeature: function( feature )

Called on click outside a previously clicked (selected) feature. Only responds if this.hover is false.

Parameters

feature

{<ALKMaps.Vector.Feature>}

overFeature

overFeature: function( feature )

Called on over a feature. Only responds if this.hover is true.

Parameters

feature

{ALKMaps.Feature.Vector}

outFeature

outFeature: function( feature )

Called on out of a selected feature. Only responds if this.hover is true.

Parameters

feature

{ALKMaps.Feature.Vector}

highlight

highlight: function( feature )

Redraw feature with the select style.

Parameters

feature

{ALKMaps.Feature.Vector}

unhighlight

unhighlight: function( feature )

Redraw feature with the “default” style

Parameters

feature

{ALKMaps.Feature.Vector}

select

select: function( feature )

Add feature to the layer’s selectedFeature array, render the feature as selected, and call the onSelect function.

Parameters

feature

{ALKMaps.Feature.Vector}

unselect

unselect: function( feature )

Remove feature from the layer’s selectedFeature array, render the feature as normal, and call the onUnselect function.

Parameters

feature

{ALKMaps.Feature.Vector}

selectBox

selectBox: function( position )

Callback from the handlers.box set up when box selection is true on.

Parameters

position

{ALKMaps.Bounds || ALKMaps.Pixel }

setMap

setMap: function( map )

Set the map property for the control.

Parameters

map	{ALKMaps.Map}

setLayer

setLayer: function( layers )

Attach a new layer to the control, overriding any existing layers.

Parameters

layers

Array of {ALKMaps.Layer.Vector} or a single {ALKMaps.Layer.Vector}